12446321685 has 48 divisors (see below), whose sum is σ = 23658345216. Its totient is φ = 5568673152.

The previous prime is 12446321677. The next prime is 12446321687. The reversal of 12446321685 is 58612364421.

It is not a de Polignac number, because 12446321685 - 2³ = 12446321677 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12446321687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145602 + ... + 214691.

It is an arithmetic number, because the mean of its divisors is an integer number (492882192).

Almost surely, 2^12446321685 is an apocalyptic number.

12446321685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12446321685 is a deficient number, since it is larger than the sum of its proper divisors (11212023531).

12446321685 is a wasteful number, since it uses less digits than its factorization.

12446321685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360362 (or 360355 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The spelling of 12446321685 in words is "twelve billion, four hundred forty-six million, three hundred twenty-one thousand, six hundred eighty-five".